Research into the inversion of the induced polarization relaxation time spectrum based on the uniform amplitude sampling method

摘要: The induced polarization relaxation time spectrum (RTS) reflects the distribution of rock pore size, which is a key factor in estimating oil or water storage capacity strata. However, as data acquisition and transmission abilities well logging instruments are much limited due to underground environment, it necessary explore suitable sampling methods can be used obtain an accurate RST with less data. This paper presents uniform amplitude method (UASM), compares conventional (UTSM) logarithm (LTSM) terms adaptability different strata, RTS inversion accuracy, stratum vertical resolution. Numerical simulation results show that UASM high accuracy kinds size formation, dynamic ranges small number points. UASM, being able adapt attenuation speed curve automatically, thus has highest samples also superior UTSM LTSM.